多级行星传动系统动力学特性分析

发布时间：2017-12-31 09:34

本文关键词：多级行星传动系统动力学特性分析　出处：《重庆大学》2012年硕士论文　论文类型：学位论文

【摘要】：行星齿轮传动由于具有高扭矩、传动比大，高可靠性、高平稳性和高传动效率等优点,被广泛应用于汽车、航空、船舶、风力发电机、重型机械等各个传动领域，但是系统的振动会引起噪声和过大的动载荷，导致设备的过早失效，引起了国内外学者的广泛关注。风电增速齿轮箱采用了多级行星传动方式，是风力发电机的重要组成部分，也是整个传动系统中故障率最高。研究风电齿轮箱动力学特性，减少风电齿轮箱齿轮传动系统的冲击和使用寿命不足成为了整个风电行业的重要课题。本文在机械传动国家重点实验室自主研究课题资助下，以某1500KW风电齿轮箱为研究对象，，建立了其刚体动力模型，进行了在装配误差、制造误差等常见误差激励下的多级行星传动动力学特性研究，有一定的学术意义和实用价值。首先，利用三维建模软件CATIA，建立了完整的风电齿轮箱实体模型。其次，从理论上探讨了风电齿轮箱传动系统内部激励和外部激励产生的主要原因，建立了基于ADAMS的多体动力学模型,仿真了齿轮传动过程中的各级齿轮啮合力的情况，并对风电齿轮箱前两级行星传动系统的均载特性进行了对比。考虑到风机的工作环境非常恶劣，其所受外力多变，尤其在风速突变的时候，冲击载荷对风机影响很大；此外受工艺水平的影响，传动轴在加工过程中经常会出现偏心等加工误差现象。针对这些情况，本文对齿轮箱在受到冲击载荷的情况下进行了模拟，同时对高速输出轴偏心状况下的冲击受力进行了模拟，为风电齿轮箱的设计提供了参考价值。进行了风电齿轮箱传动系统的非线性三维接触动态特性研究，实现了齿轮系统啮合冲击的动力学仿真，得到了齿根应力沿齿宽方向上的分布状况。为风电齿轮箱的制造提供参考。风电齿轮箱在制造装配过程中的误差是不可避免的，对风电齿轮箱的寿命和有着直接的关系。本文基于ADAMS多体动力学模型仿真了齿轮传动系统在各装配误差作用下动载系数的变换情况，从而为风电齿轮箱的制造、安装提供参考价值。
[Abstract]:The planetary gear transmission has the advantages of high torque , high transmission ratio , high reliability , high stability , high transmission efficiency and the like , and is widely applied to various transmission fields such as automobiles , aviation , ships , wind power generators , heavy machinery and the like , but the vibration of the system can cause noise and excessive dynamic loads , leading to premature failure of the equipment and causing extensive attention of scholars at home and abroad . The wind power speed increasing gear box adopts multi - stage planetary transmission mode , which is an important part of wind power generator and the highest failure rate in the whole transmission system . Firstly , a full model of wind turbine gear box is established by using CATIA . Secondly , the main reasons for the internal excitation and external excitation of wind power gearbox transmission system are discussed theoretically . Based on ADAMS , a multi - body dynamics model is established , which simulates the meshing force of gears at all stages in the process of gear transmission , and compares the load - carrying characteristics of the two - stage planetary transmission system in the wind power gearbox . Considering that the working environment of the fan is very bad , the external force is changeable , especially when the wind speed is abrupt , the impact load has great influence on the fan ; moreover , the machining error caused by eccentricity during the machining process is influenced by the influence of the process level . In view of these conditions , the gear box is simulated under the condition of impact load , and the impact force on the eccentric condition of the high - speed output shaft is simulated , and the reference value is provided for the design of the wind power gearbox . In this paper , the nonlinear three - dimensional contact dynamic characteristics of wind power gear box transmission system are studied . The dynamic simulation of meshing impact of gear system is realized , and the distribution of tooth root stress in the tooth width direction is obtained . It provides a reference for the manufacture of wind power gearbox . The error of wind power gear box during manufacturing and assembly process is inevitable , it has direct relation to the life of wind power gear box . Based on ADAMS multi - body dynamics model , the transformation of dynamic load factor of gear transmission system under each assembly error is simulated , which provides reference value for the manufacture and installation of wind power gear box .

【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH132.425

【引证文献】